Monthly Archives: January 2020

Backup database in S3

A simple cron backup script of the databse in aws s3. Our script is called mysqlbackup.sh and it looks like this:

#!/bin/bash
DB="razvantudorica"
NOW=$(date +"%m_%d_%Y")
BACKUPFILE="${DB}_${NOW}.sql.gz"
mysqldump --login-path=s3gallery --databases $DB | gzip > $BACKUPFILE
aws s3 cp $BACKUPFILE s3://backup.razvantudorica.net/$BACKUPFILE --profile backuper
rm $BACKUPFILE

And now a few explanations about the script.

First of all we need to have installed the awscli command.

Afterwords, as you can see, the database password is not hardcoded into the script. We can setup the password with mysql_config_editor. This will store authentication credentials in an encrypted login file named .mylogin.cnf.

For our example database, razvantudorica, and database user myuser, we can run

mysql_config_editor set --login-path=razvantudorica --host=localhost --user=myuser --password

The next step is to configure aws s3 bucket and credentials.

  • Create a bucket in s3, in our example is called backup.razvantudorica.net.
  • Create the IAM credentials and save them in ~/.aws/credentials as
[backuper]
aws_access_key_id=AK... 
aws_secret_access_key=...
  • And in ~/.aws/config add
[profile backuper]
region=eu-west-1
output=json
  • The last step is to test our script. If no error occurs at running and the backup file is uploaded successfully in S3, then everything is correct and we can add it the crontab list.
  • Run crontab -e and add this line
0  1 * * * /root/mysqlbackup.sh >> /var/log/mysqlbackup.log